For a policy you would like to define, select the policy type from the palette and add it to the canvas. Provide a name for the policy and edit the policy fields as appropriate.
Some policies have durations that default to infinite duration. In this case the duration will show "Infinity" for the second and nanosecond fields. (This corresponds to the DURATION_INFINITE_SEC and DURATION_INFINITE_NSEC constants in the DDS IDL module.)
You can indicate that a second or nanosecond field is infinite by entering "Infinity" (or "inf" for short) when editing the field.